FA20 Engine Oiling, Bearings, and Starvation

[Nigelr32]

Search Reimax oil pump gears on google and I'm sure you'll find what you're looking for. I'll probably be selling my Reimax pump and RacerX sump soon as I am going dry sump.

[Spartarus]

Originally Posted by Nigelr32

I have a Reimax pump and have done a comparison of that and the stock pump over gt86.org.uk. From memory, the Reimax pump will flow around 5litres more oil than stock at around 6000rpm.
Remember, the Reimsx pump is also billet, stock is sintered.

I originally dug up the math on the volume difference from your post over on that forum.. Think I linked your thread in my original post suggesting it. That's what got me interested in the pump in the first place, that and knowing Element had limited success with a slightly higher volume pump (the FA20DIT pump).

I bought one, verified the math, concluded the volume should be significantly higher than both pumps, and sent it to Element tuning to test on their race car. Haven't heard back yet.

Did you ever get a running engine / data logged comparison after installing the Reimax pump?

[Luckrider]

Originally Posted by Nigelr32

Search Reimax oil pump gears on google and I'm sure you'll find what you're looking for. I'll probably be selling my Reimax pump and RacerX sump soon as I am going dry sump.

I think I am misunderstanding, are you talking about higher flow from just the gears, or an entire new pump?

[Nigelr32]

Originally Posted by Luckrider

I think I am misunderstanding, are you talking about higher flow from just the gears, or an entire new pump?

The Reimax pump is only the gears, the stock casing is used.

[Luckrider]

Originally Posted by Nigelr32

The Reimax pump is only the gears, the stock casing is used.

Thanks. The product descriptions I've seen make no mention of the increased oil flow. They simply talk about the strength benefit like the factory one is going to explode.

[Nigelr32]

Just reading through the last couple of pages on this thread, and thought I'd post this..


Some talk of head restrictions to get more oil to the crank. Subaru have already done this with the holes in the rocker posts. Early engines have massive holes in the right bank of tappets, whereas later engines have smaller holes in all 16 rocker posts. I don't remember the actual size differences, but it's quite big when considering area.

[Ultramaroon]

Originally Posted by Nigelr32

Early engines have massive holes in the right bank of tappets, whereas later engines have smaller holes in all 16 rocker posts. I don't remember the actual size differences, but it's quite big when considering area.

Do we know when they updated? Serial numbers?

[Calum]

Originally Posted by Nigelr32

Just reading through the last couple of pages on this thread, and thought I'd post this..


Some talk of head restrictions to get more oil to the crank. Subaru have already done this with the holes in the rocker posts. Early engines have massive holes in the right bank of tappets, whereas later engines have smaller holes in all 16 rocker posts. I don't remember the actual size differences, but it's quite big when considering area.

So my early 2012 car is likely fucked. roger

[EAGLE5]

PM him. He still logs on.

[Nigelr32]

Originally Posted by Calum

So my early 2012 car is likely fucked. roger

No way. I have no idea when the change was made, I just noticed the difference on a rebuild of my 2012 engine. I believe there were issues with the cam timing? This may be something to do with it??
I have a 2012 and a 2014, this is how I found the difference. The earlier engines have a different part no for left and right rocker posts, later they're the same.





Heres a pic of the left and right next to each other..

[Calum]

Originally Posted by Nigelr32

No way. I have no idea when the change was made, I just noticed the difference on a rebuild of my 2012 engine. I believe there were issues with the cam timing? This may be something to do with it??
I have a 2012 and a 2014, this is how I found the difference. The earlier engines have a different part no for left and right rocker posts, later they're the same.





Heres a pic of the left and right next to each other..

You wouldn't happen to have the part number for the correct part? I'd like to order a set so I can update the one side when I pull the engine to adjust the valve lash. It would also be really good info to have available.

Thanks by the way.


Also, is it just me, or are those holes huge for the given purpose?

[Nigelr32]

Originally Posted by Calum

You wouldn't happen to have the part number for the correct part? I'd like to order a set so I can update the one side when I pull the engine to adjust the valve lash. It would also be really good info to have available.

Thanks by the way.


Also, is it just me, or are those holes huge for the given purpose?

Sorry, I don't have the part numbers. Before changing anything, you might want to check the timing gears haven't changed to suit the different pressure in that are.. I doubt it, but you might want to be sure first??

[Calum]

Originally Posted by Nigelr32

Sorry, I don't have the part numbers. Before changing anything, you might want to check the timing gears haven't changed to suit the different pressure in that are.. I doubt it, but you might want to be sure first??

Good point, I'll keep that in mind for sure.

[Spartarus]

Originally Posted by Luckrider

I think I am misunderstanding, are you talking about higher flow from just the gears, or an entire new pump?

I see your misunderstanding. It's a gear type pump. If you look up positive displacement gear pump you can find a few helpful animations to explain it. The gear doesn't turn the pump, the gear IS the pump. Well, it is the guts of the pump. The gear and outer ring are the part that actually moves the oil. These gears form a bigger pocket, moving more oil per rev.